Rodinga, NT, 1990 (P1016), radiometric line data, AWAGS levelled

The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This Rodinga, NT, 1990 (P1016), radiometric line data, AWAGS levelled were acquired in 1990 by the NT Government, and consisted of 51146 line-kilometres of data at 300m line spacing and 80m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.

辐射测量法（伽马射线能谱法，gamma-ray spectrometric method）可通过探测地表附近的伽马射线自然变化，反映钾（K）、铀（U）和钍（Th）的自然放射性衰变产生的辐射信号。收集所得数据将通过标准流程处理，确保记录到的响应仅源自地下岩石。处理后得到的数据集可通过解译揭示地下地质构造。经处理的数据将由GA地球物理学家开展质量核查，确保GA发布的最终数据符合使用要求。本次数据集为1990年北领地（Northern Territory，NT）罗丁加（Rodinga）地区的经全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey，AWAGS）平差的辐射测量航线数据（编号P1016），由北领地政府于1990年采集，总航线长度达51146线公里，航线间距为300米，地形离地高度为80米。为抑制数据中的长波长成分，本次调查采用独立数据集——全澳航空地球物理调查（AWAGS）航空磁测数据——校准调查数据的基准面，本航线数据本质上已按AWAGS标准完成平差校正。